期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 22, 期 6, 页码 4695-4705出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-014-3714-x
关键词
UV-B radiation; Photosynthetic properties; Senescence; Antioxidant enzymes
资金
- National Natural Science Foundation of China [31271621]
- Natural Science Foundation of Jiangsu Province, China [11KJA180001]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- NSFC for Talents Training in Basic Science [J1103507, J1210025]
Despite the increasing occurrence of ultraviolet-B (UV-B) radiation, its molecular mechanism is poorly documented in higher plants compared to other environmental stress. In present study, the influence of supplemental UV-B radiation on photosynthetic performance and antioxidant enzymes in rice (Oryza sativa L.) was investigated. Supplemental UV-B radiation reduced net photosynthetic rate in rice flag leaves during senescence stage. By means of the JIP-test, it was found that the potential of processing light energy through the photosynthetic machinery was slightly inhibited by the increased thermal dissipation. Furthermore, 18 thylakoid membrane protein spots were differentially expressed (5-fold or greater variation compared to the control) in supplemental UV-B-treated rice. These identified proteins were involved in various cellular responses and metabolic processes including photosynthesis, stress defense, Calvin cycle, and others of unknown functions. Taken together, these results suggested that physiological changes that resulted from supplemental UV-B radiation were linked to the light reaction, carbon metabolism, and antioxidant enzymes in rice leaves during senescence stage.
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